DATETIME TYPE OF SQLITE & OBJECTIVEC

Eric Martell

Total Post:9

Points:63
Posted by  Eric Martell
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I have created a SQLite table in my app, and I tried to map an object using Objective-C programming.
First attribute of table 'Save_time' of type DATETIME.


Now, I want to create a property on my Obj-C class that will map to the 'save_time' attribute.
I read that Objective C has a class name NSDate, but I am not sure that will map it directly or not?

  1. Tarun Kumar

    Post:214

    Points:1642
    Re: DATETIME type of SQLite & ObjectiveC

    The formatter is important if you are trying to effect the presentation but if you use if for internal storage, you are defining a string which can defeat the DB-engine's ability to use the value for computation, comparison, sorting, etc. Also, if you are going to have different clients inserting the date value into the DB you would have to write conversion functions everywhere.

    Use this code and it worked as expected (schema's column defined as DATETIME):

    dateExpires = [NSDate dateWithTimeIntervalSinceNow: sqlite3_column_double(queryStmt, 5)];

    I inserted into the SQLITE3 db with the Firefox add-on as "4/12/2010" here in Central time zone. Viewing the value of 'dateExpires' in XCode-debugger displayed as:
    2015-11-11 13:19:48 -0500
    Sure enough, that is the correct time.
    Also, to insert into the SQLITE DB you will put the value [NSDate date]

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